\usemodule[visual]

\setuppapersize[B5]
\setuplayout[width=fit,height=fit,backspace=10mm,cutspace=10mm,topspace=10mm,margin=10mm,header=10mm,footer=10mm]
\setuppagenumbering[location={header,right},style=\bfb]

\starttext
% % % ================== 各级标题初认识 ==================
% % % ================== 代码示例 - 2：指定章节的数字编号

\chapter[chapter1]{Story A}
\section[ownnumber=2,title=Part 1]
\fakewords{30}{50}
\section[title=Part 2]
\fakewords{30}{50}




\stoptext